When you create users with database-level properties, those users are available to the specified database only.
You set the property once for each user. To delete a user, set that user's password to null.
-- adding the user sa with password 'derbypass' CALL SYSCS_UTIL.SYSCS_SET_DATABASE_PROPERTY( 'derby.user.sa', 'derbypass') -- adding the user mary with password 'little7xylamb' CALL SYSCS_UTIL.SYSCS_SET_DATABASE_PROPERTY( 'derby.user.mary', 'little7xylamb') -- removing mary by setting password to null CALL SYSCS_UTIL.SYSCS_SET_DATABASE_PROPERTY( 'derby.user.mary', null)